Recently lunularic acid (lb), a new growth inhibitor from Lunularia cruciata (L) Dum., has been isolated and characterized. 1 Final proof of the structure was provided by the derivation of lb from hydrangenol (2).lr2 The synthesis of
Convenient synthesis of bisphosphonomethylphosphoric acid
✍ Scribed by Valérie Gagnard; Alain Leydet; Véronique Barragan; Jean-Louis Montero
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 68 KB
- Volume
- 14
- Category
- Article
- ISSN
- 1042-7163
- DOI
- 10.1002/hc.10105
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✦ Synopsis
Abstract
The reaction of phosgene or triphosgene with trimethylsilyl dialkylphosphites led to bisdialkylphosphonomethyl‐dialkylphosphates in good yields. The cleavage of the allyl ester was carried out under mild conditions using the Wilkinson catalyst. © 2003 Wiley Periodicals, Inc. Heteroatom Chem 14:111–113, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.10105
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by basic hydrolysis is the standard method to prepare cyclopropene carboxylic acidst2). We have found, however, that if the cyclopropene resulting from the initial addition has a benzylic hydrogen adjacent to the ring, the alkaline hydrolysis condition lead instead to methylenecyclopropane acids. T